Assay of fluoride by a novel organic–inorganic mesoporous nano‐sized sensor

Ma, Qianmin; Lai, Yuming; Gao, Jinwei; Wang, Qianming

doi:10.1002/bio.3081

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…With the development of nanotechnology and the demand for disease diagnosis and treatment, silica based nanomaterials have been widely used in the field of gene and drug delivery or other fields due to their good biocompatibility and easy surface modification . Mesoporous silica nanoparticles (MSNs) have been well recognized as potential carriers for the development of gated supports and the design of ‘ON–OFF’ delivery system because of their unique characteristics, such as regular mesoporous structure, large pore size and load capacity, tunable pore diameter distribution and modifiable surface properties …”

Section: Introductionmentioning

confidence: 99%

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Chang

Zheng

2017

Luminescence

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In this paper, polyethylenimine (PEI) and Chitosan were simultaneously one-step doped into silicon dioxide (SiO ) nanoparticles to synthesize PEI/Chitosan/SiO composite nanoparticles. The polymer PEI contained a large amount of amino groups, which can realize the amino functionalized SiO nanoparticles. And, the good pore forming effect of Chitosan was introduced into SiO nanoparticles, and the resulting composite nanoparticles also had a porous structure. In pH 7.4 phosphate buffer solution (PBS), the amino groups of PEI had positive charges, and therefore the fluorescein sodium dye molecule can be loaded into the channels of PEI/Chitosan/SiO composite nanoparticles by electrostatic adsorption. Furthermore, utilizing the diversity of DNA molecular conformation, we designed a high sensitive controllable assembly of DNA gated fluorescent sensor based on PEI/Chitosan/SiO composite nanoparticles as loading materials. The factors affecting the sensing performance of the sensor were investigated, and the sensing mechanism was also further studied.

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Section: Introductionmentioning

confidence: 99%

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Chang

Zheng

2017

Luminescence

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“…Following the second approach previously indicated, Wang et al described a material for detecting fluoride [ 47 ]. This anion is one of the most studied, due to its strong tendency to form a hydrogen bond that causes a change in the optical properties of many organic moieties.…”

Section: Detection Studiesmentioning

confidence: 99%

Mesoporous Silica Nanoparticles in Chemical Detection: From Small Species to Large Bio-Molecules

Parra

Gil

Gaviña

et al. 2021

Sensors

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A recompilation of applications of mesoporous silica nanoparticles in sensing from the last five years is presented. Its high potential, especially as hybrid materials combined with organic or bio-molecules, is shown. Adding to the multiplying effect of loading high amounts of the transducer into the pores, the selectivity attained by the interaction of the analyte with the layer decorating the material is described. Examples of the different methodologies are presented.

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“…These experimental conditions are usually difficult to control in the experimental process. Moreover, as the concentration of analyte changes, the color of the ratio probe changes step‐by‐step, thereby enabling visual detection of the analyte, and semi‐quantitative and qualitative analysis of the analyte can be achieved depending on the color of the ratio probe . Therefore, the construction of ratiometric fluorescence sensors is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

et al. 2019

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Zeolitic imidazolate framework-8 (ZIF-8) loading rhodamine-B (ZIF-8@rhodamine-B) nanocomposites was proposed and used as ratiometric fluorescent sensor to detect copper(II) ion (Cu 2+ ). Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption isotherms and fluorescence emission spectroscopy were employed to characterize the ZIF-8@rhodamine-B nanocomposites. The results showed the rhodamine-B was successfully assembled on ZIF-8 based on the π-π interaction and the hydrogen bond between the nitrogen atom of ZIF-8 and -COOH of rhodamine-B. The as-obtained ZIF-8@rhodamine-B nanocomposites were octahedron with size about 150-200 nm, had good water dispersion, and exhibited the characteristic fluorescence emission of ZIF-8 at 335 nm and rhodamine-B at 575 nm. The Cu 2+ could quench fluorescence of ZIF-8 rather than rhodamine-B. The ZIF-8 not only acted as the template to assemble rhodamine-B, but also was employed as the signal fluorescence together with the fluorescence of rhodamine-B as the reference to construct a novel ratiometric fluorescent sensor to detect Cu 2+ . The resulted ZIF-8@rhodamine-B nanocomposite fluorescence probe showed good linear range (68.4 nM to 125 μM) with a low detection limit (22.8 nM) for Cu 2+ combined with good sensitivity and selectivity. The work also provides a better way to design ratiometric fluorescent sensors from ZIF-8 and other fluorescent molecules. KEYWORDSCu 2 + , ratiometric fluorescent sensor, rhodamine-B, zeolitic imidazolate framework-8 biotoxicity, poor aqueous solubility and stability, etc. Nanomaterial fluorescent probes, especially the metal-organic frameworks (MOFs) or zeolitic imidazolate framework-8 (ZIF-8) based probes, are attracting more and more interest and are used for different applications due to their predictable pore sizes, considerable specific surface area, good encapsulation and hierarchical structures. [35][36][37][38][39] For example, carbon dots (CDs)@MOFs have been prepared to enhance fluorescence sensing. [40] A ratiometric type fluorescence sensor has two or more emission wavelengths, and the target content is usually quantified based on the relationship between the ratio of fluorescence intensities at two wavelengths and the concentration of the analyte. At the same time, this sensor mode enhances the dynamic response range by adjusting the change of intensity ratio, and establishes an internal standard to make it self-regulating, greatly weakening the effect some experimental conditions such as probe concentration, temperature, polarity, environmental pH, and stability. These experimental conditions are usually difficult to control in the experimental process. Moreover, as the concentration of analyte changes, the color of the ratio probe changes step-by-step, thereby enabling visual detection of the analyte, and semi-quantitative and qualitative analysis of the analyte can be achieved depending on the color of the ratio probe. [41,42] Therefore, the construction of rati...

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Assay of fluoride by a novel organic–inorganic mesoporous nano‐sized sensor

Cited by 7 publications

References 23 publications

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Mesoporous Silica Nanoparticles in Chemical Detection: From Small Species to Large Bio-Molecules

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

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Assay of fluoride by a novel organic–inorganic mesoporous nano‐sized sensor

Cited by 7 publications

References 23 publications

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO2 fluorescent sensor

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO2 fluorescent sensor

Mesoporous Silica Nanoparticles in Chemical Detection: From Small Species to Large Bio-Molecules

Ratiometric fluorescent detection of Cu2+ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

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Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Study of the controlled assembly of DNA gated PEI/Chitosan/SiO₂ fluorescent sensor

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites